Ontario Geological Survey
Permanent Link to this Record:
MDI31E01SE00200
| Record Name(s) | Acmac Mining Corporation Ltd. - 1955, Clark Family Farm - 1955 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1981-Sep-16 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Uranium, Thorium
Township or Area: Monmouth
Latitude: 45° 1' 22.12" Longitude: -78° 13' .61"
UTM Zone: 17 Easting: 719269 Northing: 4989253 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31E01SE
Point Location Description: Precise
Location Method: Data Compilation
Access Description: Access is by a secondary road east from Highway 648. The road is about 1.38 km south of the town of Wilberforce which is located on Highway 648.
1955: Acmac Mining Corparation - an open cut 56 feet long, an adit 34 feet long and trenches and cuts totalling 425 feet; ground radiometric survey.
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Bancroft
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Granite | 1 | Granite | Contains |
|---|---|---|---|---|
| Amphibolite | 2 | Host | ||
| Contact Metasomatic-Unsubdivided | 3 | Host | ||
| Marble | 4 | Adjacent |
Jan 29, 2017 (A Wilson) - Mineralization occurs within pyroxene-poor granite representing the contact zone between graphic granite and underlying limy amphibolite which strikes N75-90º E and dips 25-35º S. This deposit occurs in a deformed sequence of intercalated marble and para-amphibolite containing several interbeds of pyroxene-rich metasediments. Late tectonic, light pink, leucocratic granite pegmatite and pegmatitic granite dikes, which are locally uraniferous occur along some contacts of pyroxene-rich metasediments with para-amphibolite or marble. An open cut, 18.6 m long and its extension, an adit 10.1 m long was driven into a hillside to test down dip extension of this pegmatite. The adit intersected a shallow dipping, 5m thick zone containing several leucocratic granite pegmatite dikes conformably cutting contact metasomatized, pyroxene-rich metasediments and marble. Along their contacts, the pegmatites have partially assimilated and replaced the metasediment.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Uranothorite | Economic | Ore | ||||
| 2 | Thorite | Economic | Ore | ||||
| 3 | Titanite | Economic | Ore | ||||
| 6 | Uraninite | Economic | Ore | ||||
| 8 | Zircon | Economic | Ore | ||||
| 1 | Actinolite | Economic | Gangue | ||||
| 2 | Diopside | Economic | Gangue | ||||
| 3 | Phlogopite | Economic | Gangue |
Jan 29, 2017 (A Wilson) - The pale-pink graphic granite has low radioactivity with Geiger readings of 2x-10x, the background count on marble being 300-700 cpm. The contact zone of the granite mass is a pyroxene-poor granite with altered pyroxene crystals 1/8 to ½ inches across, accompanied by abundant accessory titanite. This material in the open cuts gave Geiger readings of 20x-80x. The radioactive mineral is uranothorite. In the most westerly open cut, a highly fractured zone, 1 ft. thick, with a platy parting, is present at the contact with the underlying limy amphibolite. This zone contains abundant altered, earthy-red crystals of thorite, 1/16 to ¼ inch across, replaced by amber grains of uranothorite, quartz and other mineral. Minute black grains of uranothorite accompany the thorite crystals. No assays or further work on the property have been recorded. In 1979 this occurrence was available for staking.
Dec 07, 2005 (D Laidlaw) - Geiger readings of the mineralization ranged from 20 to 80 times background (OFR 5311, p129).
Publication - Canadian deposits of uranium and thorium; Geological Survey of Canada, Economic Geology Series 16
Publication Number: GSC EconGeol 16 Page: 271 Date: 1952
Author: Lang, A.H.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/102450
Part - Radioactive mineral occurrences in the Bancroft area
Publication Number: ARV65-06 Page: 82-83 Date: 1998
Author: Satterly J., Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Uranium and thorium deposits of southern Ontario
Publication Number: MDC004 Page: 25 Date: 1967
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of Glamorgan and Monmouth townships, Haliburton County
Publication Number: OFR5021 Page: 143-145 Date: 1997
Author: Armstrong H.S., Gittins J.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Uranium and thorium deposits of southern Ontario
Publication Number: OFR5311 Page: 129 Date: 1981
Author: Gordon J.B., Rybak U.C., Robertson J.A.
Publisher Name: Ontario Geological Survey
Location:
Mono - Precambrian geology of the Centre Lake area, Haliburton and Hastings counties
Publication Number: OFR5658 Page: 87-88 Date: 1987
Author: Bright E.G.
Publisher Name: Ontario Geological Survey
Location:
Mono - Granitic pegmatites of the Bancroft area, southeastern Ontario
Publication Number: OFR5717 Page: 123-124 Date: 1990
Author: Goad B.E.
Publisher Name: Ontario Geological Survey
Location:
Map - Monmouth Township, Haliburton County
Publication Number: M2174 Scale: 1:31,680 Date: 1970
Author: Armstrong H.S., Gittins J.
Publisher Name: Ontario Dept. of Mines
Location:
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